Punch.



PATENTED 0012.4, 1904.

R. W. BAKKER.

PUNCH.

APPLICATION FILED un 2s, 1904.

I- NOMODEL.

Patented October 4, 1904.

PATENT ROBERT IV. BARKER, OlE PHILADELPHIA, PENNSYLVANIA.

PUNCH.

SPECIFICATION forming part of Letters Patent No. 771,694, dated. October4, 1904.

Application filed May Z8, 1904.

YTo LZZ whom t may 'con/cern:

My invention relates to punch-holders and punches such as are used onpresses and the like. It provides novel means for securely holding aplurality of punches with their upper ends firmly abutting against thehead of a holder, so that they have all the strength of a solid punchand are at the same time detachable, so that they may be readilyreplaced in case of breakage.

It further consists of novel features of construction, all as will behereinafter fully set forth.

Figure 1 is a horizontal section through line a' a', Fig. 2. Fig. 2 isavertical section through line 1/ e/, Fig. l. Fig. 3 is an elevation ofa collar. Fig. 4 represents in reverse perspective the jaws. Fig. 5 isan elevation, partly broken away, of the head portion.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, l designates the shank of a punch-holder, atthe lower end of which is a head 2, provided with an externalscrew-thread 3 and having in its face a polygonal recess 4.

5 designates a ferrule having an internal thread 6 at its upper end,adapted to engage with the thread 3 on the head 2, and having its lowerend 7 tapered, as shown.

8 designates one of a set of jaws, shown in Fig. 4 as four in number.These when united form a cone-frustum adapted to fit snugly in the taperportion 7 of the ferrule 5. As shown in Fig. 4, the meeting faces of thejaw 8 are provided with semiconical recesses, as 9, so disposed thatwhen the four quadrantal sectors 8 of the jaw are united four conical ortapered sockets are produced therein. Each of the sockets 8 is providedat its larger end with a longitudinally-extending head l0, the fourheads when united adapted to fit snugly within the recess 4 in the head2.

Il designates a punch having a tapered p0r- Serial No. 210,175. (Nomodel.)

tion 12, adapted to fit within the sockets in the jaws 8.

The operation is as follows: The parts are assembled by bringing'together the four sectors 8, (shown in Fig. 4,)dropping them within theferrule 5, and slipping therein vthe y punches 1l, the tapered bodyportions 12 of which extend beyond the heads 10 ofthe sectors 8, as isclearly shown in Fig. 2 of the drawings. The thread 6 on the collar 5 isthen engaged with the thread?) on the head 2 and the collar turned untilthe upper ends of the punches Il are firmly abutted against the lowerwall of the head 2 within the recess 4. When the collar 5 is firmlyscrewed in position, the punches 11 will be firmly held between the jaws8 with their upper ends abutting against the head 2 of the punch-holder,so that they are practically as firm as a solid punch.

- In ease the end of one of the punches 1l is clipped 0r sheared it maybe easily replaced by another at a minimum expense of both labor andstock.

It will be noted that the heads 10 of the jaws 8 engage in the recess 4of the head 2, so as to prevent any twisting of the jaws or punches whenthe ferrule 5 is being screwed home. By these means the accuratealinement of the punches is maintained and any danger 0f shearing themor the die is obviated. It will also be seen that both the bodies andthe heads of the jaws 8 are spacedV away from the face of the head 2, sothat all the force of the ferrule is exerted to hold the punches 11against the head. It is obvious that any number of jaw-sectors suitablyrecessed may be provided to hold two, three, or any desired number ofpunches.

It is obvious that by the term punch .I include not merely a device forpiercing a sheet of metal or other material, but any form of similartool which may be used for setting down rivet-heads, bending or formingsmall articles of metal or the like, or any other wellknown operation,and particularly for making tablets.

It will be evident that various changes may be made by those skilled inthe art which may come within the scope of my invention, and

IOL)

I do not, therefore, desire to be limited in everyinstance to the exactconstruction herein shown and described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A punch comprising a head, a plurality of jaw portions havingcoacting recesses in their meeting faces forming a plurality of socketswhen the jaw portions are assembled, a plurality oi' punches detachablyengageable in said sockets and projecting beyond the inner end thereof,and a ferrule adapted to inclose said jaw portions and to secure them tosaid head.

2. A punch comprising a head, having a polygonal recess in its face, aplurality of jaw portions having coacting recesses in their meetingfaces forming a plurality of sockets when said jaws are assembled, headsadapted to engage in said polygonal recesses, a plurality of punchedadapted to lit in said socket, and a ferrule the lower portion of thewall of which is tapered to inclose said jaw portion and the upperportion of the wall of which is adapted to engage said head.

3. A punch comprising a head having a polygonal recess in its face, aplurality of jaw portions having tapered coacting recesses in theirmeeting faces forming tapered sockets when the jaw portions areassembled, a plurality oi' tapered punches detachably engageable in saidsockets and projecting thereabove and into said polygonal recess and aferrule adapted to inclose said jaw portions to secure them to said headand to firmly hold the inner ends of said-punches against the face ofsaid head.

ROBERT W. BARKER. Witnesses:

GEO. L. COOPER, C. D. MGVAY.

